package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * 套餐管理实现类
 */
@Slf4j
@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐，同时需要保存套餐和菜品的关联关系
     * @param setmealDTO
     */
    @Override
    public void saveWithDish(SetmealDTO setmealDTO) {
        //1.获取套餐信息
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        // 插入套餐表
       setmealMapper.insert(setmeal);
//        3.根据套餐id获取菜品信息

//        获取生成套餐的id
        Long setmealId = setmeal.getId();
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();

        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        //保存套餐和菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);



    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {

//        1.使用分页插件构建分页查询对象
         PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
//        2.调用分页查询方法
       Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);
        long total = page.getTotal();
        List<SetmealVO> records = page.getResult();
//        3.返回结果封装为pageresult对象
        return new PageResult(total,records);
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {

        for (Long id : ids) {
            //   1.检查套餐的状态，是否为启售状态 若是启售状态抛出异常
//             1.1根据id查询出setmeal表，获取状态
          Setmeal setmeal=setmealMapper.getById(id);
          if(setmeal.getStatus()== StatusConstant.ENABLE){
              throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
          }
        }
        for (Long setmealId : ids) {
            // 根据id删除套餐表 setmeal
            setmealMapper.deleteById(setmealId);
            //       根据id删除套餐关系表 setmeal_dish
            setmealDishMapper.deleteBySetmealId(setmealId);
        }
    }

    /**
     * 根据id查询出套餐和菜品信息
     * @param id
     * @return
     */
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        SetmealVO setmealVO = setmealMapper.getByIdWithDish(id);
        return setmealVO;
    }

    /**
     * 修改套餐
     *
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //1、修改套餐表，执行update
        setmealMapper.update(setmeal);
        //套餐id
        Long setmealId = setmeal.getId();
        //2、删除套餐和菜品的关联关系，操作setmeal_dish表，执行delete
        setmealDishMapper.deleteBySetmealId(setmealId);
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
          setmealDish.setSetmealId(setmealId);
        });
        //3、重新插入套餐和菜品的关联关系，操作setmeal_dish表，执行insert
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 套餐启售禁售
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"

//        1.判断套餐中是否有停售菜品
            if(status==StatusConstant.ENABLE){
                List<Dish> dishList= dishMapper.getBySetmealId(id);
                //判断菜品中是否包含未启售菜品
              if(dishList!=null&&dishList.size()>0){
                  dishList.forEach(dish -> {
                      if(dish.getStatus()==StatusConstant.DISABLE){
                          throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                      }
                  });
              }

            }
        Setmeal setmeal = Setmeal.builder()
                .status(status)
                .id(id)
                .build();
            setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
